33 C.F.R. § 173.33 Removal of number.
Title 33 - Navigation and Navigable Waters
The person whose name appears on a certificate of number as the owner of a vessel shall remove the number and validation sticker from the vessel when: (a) The vessel is documented by the Coast Guard; (b) The certificate of number is invalid under paragraph (c) of §173.77; or (c) The vessel is no longer principally used in the State where the certificate was issued.
Title 33: Navigation and Navigable Waters
PART 173—VESSEL NUMBERING AND CASUALTY AND ACCIDENT REPORTING
Subpart B—Numbering
§ 173.33 Removal of number.